Boyle, Robert, New experiments physico-mechanicall, touching the spring of the air and its effects, 1660

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              <s>
                <pb xlink:href="013/01/306.jpg" pagenum="276"/>
              Pump to be ſomewhat obſtinately ply'd,
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              to diſcover the better what may be ex-
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              pected from the thinneſs of the medium
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              in this Experiment; the Impriſon'd Air
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              broke its brittle Priſon, and throwing the
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              greateſt part of it againſt the ſide of the
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              Receiver, daſh'd it againſt that thick Glaſs
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              into a multitude of pieces.</s>
              <s>Which Acci-
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              dent I mention, partly that it may con-
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              firm what we deliver'd in our Reflections,
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              upon the firſt Experiment, where we con-
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              ſider'd what would probably be done by
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              the Spring of Air Impriſon'd in ſuch
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              Glaſſes, in caſe the ballancing preſſure of
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              the ambient Air were withdrawn; and
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              partly, that we may thence diſcern of how
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              cloſe a Texture Glaſs is, ſince ſo very
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              thin a film of Glaſs (if I may ſo call it)
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              prov'd ſo impervious to the Air, that it
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              could not get away through the Pores,
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              but was forc'd to break the glaſs in pieces
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              to free it ſelf; and this, notwithſtanding
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              the time and advantage it had to try to
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              get out at the Pores.</s>
              <s>And this I mention,
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              that neitherour Experiments, nor thoſe
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              of divers Learned Men, might receive
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              any prejudice from an Experiment which
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              I happen'd to make divers years ago, and,
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              which having been ſo much taken notice</s>
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